Linux in a Nutshell, Fifth Edition

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Chapter 3: Linux Commands

This is the Title of the Book, eMatter Edition

Copyright © 2006 O’Reilly & Associates, Inc. All rights reserved.

-V, --version

Print version information and exit.

--verbose

Operate verbosely; print progress messages.

id

id [options] [username]

Display information about yourself or another user: user ID, group

ID, effective user ID and group ID if relevant, and additional group

IDs.

Options

-g, --group

Print group ID only.

-G, --groups

Print supplementary groups only.

-n, --name

With -u, -g, or -G, print user or group name, not number.

-r, --real

With -u, -g,or-G, print real, not effective, user ID or group

ID.

-u, --user

Print user ID only.

--help

Print help message and then exit.

--version

Print version information.

ifconfig

ifconfig [interface]

ifconfig [interface address_family parameters addresses]

TCP/IP command. Assign an address to a network interface and/or

configure network interface parameters. ifconfig is typically used at

boot time to define the network address of each interface on a

machine. It may be used at a later time to redefine an interface’s

address or other parameters. Without arguments, ifconfig displays

the current configuration for a network interface. Used with a

single interface argument, ifconfig displays that particular inter-

face’s current configuration. Note that interfaces are numbered

starting at zero: eth0, eth1, eth2, and so forth. In most cases, eth0 ...